Clutch



Jan. 8, 1929.

CLUTCH W. P. .COFFMAN ET AL Filed Dec. 15, 1924 WILLIAM P. COFF'MANLOEDUNKIRK, AND cann grammes, on pavilion; ASSIGNORS TO THE EDGEMONTMACHINE oomrnny; or DAYTON, onto, nfooit- Patented Jan. 8, 1929.

PORATION OF OHIO.

I me

environ. I 7

Application filed December 15, 1924, Serial No, 755,972.

, This invention relates to friction clutches and particularly the discor ring type.

to quick acting clutches of In the present invention there iscontemplated a construction embodying drivmg'and driven members, one ofwhich is fixed upon a shaft while the other. is loosely journalleduponthe shaft and carries a friction ring to be intermittently clampedto: the' flxed Inem-, her. The-structural features involve'inthe fixedmember, a head portion hav ng a pe ripheral flange forming one ofpair'of I clamping members fontheengagement of the frlctlon ring, suchclamping flange hav-" ing extending atone side thereof, an annularconcentric flange upon which is slidingly mounted an axially movableclamp ring, 00- acting with the peripheral-flange to clamp the frictionring interposed therebetween, while at the opposite sideof theperipheral flange projects a second annular concentric flange forming abearing upon Which-axially slides anadj-ust-ing ring formed in tworelatively adjustable sections,'one of which is coupled to the clampring, while the other is directly engaged by the series ofoscillatoryactuat ng levers, the relat1ve ad ustment of the sections.

of such ringserving to compensate forwear I orto vary the clampingpressure of the adjustable clamping ring, The loose 7 member has beenillustrated as aflanged pulley withinthe interior of the flange of whichthe friction ring is mounted for independent axial adjustment but forrotation in unison with the pulley. It will be understood that in lieuof the pulley, other mechanical elements oristructures to be connectedwith and disconnected from the shaft may be substituted.

The object of the invention is to simplify the structure as well as themeans and mode of operation of quick acting frictional clutches,wherebyjthey will notionly be cheapened' in construction, but will bemore eficient in op eration, uniform and positive in action, capableoffbeingquickly anclea'sily engaged and disengaged, 0fincreaseddurability and unlikely to get out of repair. I 1 V i A furtherobject of the invention is toprovide improved adjustingfmeansforengaging and disengaging the driving and driven members and to furtherprovide adjustable means of simple and economical form for. varying theengaging pressure and for compensating fo'r'wear.

l/Vith the above primary and other inciden tal objects in viewaswillniore fully appear in the specification, the invention consists ofthe features of construction, of'the' partsand' described and set forthinqthe olaimsl Referring to the accompanyingdrawings,'

wherein. is shown the preferred,'but' obviously, not necessarily theonly, form of embodiment of the invention, Fig. 1 is'a longitudinalsectional view of theass'embled clutch mec'ha nism embodyingthe'p'resent invention." Fig. I i

2 is a side elevation, partly in section. Fig.

3 is a detail vi'ewof the key connection between the fricton ringandp'ulley.

asters. of

the clutch mechanism is mounted.v In this" lake parts are indicated bysimilar charreferencethroughout the several -VlGWS.

instancefthe shaftlis shown 'as hollow and having extending therethroughthe recipro'' catory ro'd'2 connected tothe shift collarby which theclutch is set and released. It will x be'undorstood thatthis mode ofoperation" is not an essential detail of'the clutch'construc- 8,uponth'elshaft l, is a normiallyloose pulleydg' i Vithin the flange .5 ofthepulley 4 there are keys 8. f This'friction ring 7 is provided onopposite sides with strata or 'facings offrio tion materialt). Thefriction ring 7 is thusmount-ed for rotationin unison, with-the 'tion.Mounted upon suitable ballbearings' pulley ,4, but capable of'to and frosliding" movement in an axial thereto;

Fixedly secured upon the shaft 1 is a second directionin relation clutchelement comprising a hub portion 10',

provided with a peripheralflange disposedin a plane perpendicular to theaxis of rotation.

This peripheral flange 11, forms one of a pair of clamplng membersfor:-gr1pp1ng tl 1 e fries. 'tion ring 7.; PrO ectmg nwardly toward thepulley 4 from said flange 11, and overhangingthehub of the'pulley is anannular-flange l2, concentric wi-ththe axis of rotation. This flange1-2,aflords a-bear1ng for an axially adgbl clamp ring 13,0ompleme1itary'to the .1 flange 1'1, which slides to and fro upon the annularflangelQtgrip the" friction ring "ring-18;

' resisting the approach' of the clamp ring mounted in the flange-11 andprojecting through corresponding holes in the clamp At the'oute sideofthe peripheralflange 11, there is provided a secondannular flange15,Iconcentr1c in relation With the axis of'rotation and enclosing anaxially adjustable actuating ring, This, actuating ring is formed, new)sections16, and '17, screw threaded one into the other. The section-16 iprovided at spaced intervals with 'lu or i cars 18,. in wh ch are p v iwhich the clamp ring '13 is coupled to the v secured studs 19, by.tuating ring. vl-Ielical springs ing the studs are I flange 11 and theclamp r ng 13 yieldingly 2O surround and serving to eife'cta quickdisengagement ofthe clampring from the fi-iction ring upon therelaxationof pressure upon such spring.-

The, sectio'n 17 of the actuatingring screw threadedvvithin the section16affords-an iabutment'shoulder121, for the engagement y shaped i riedby the oscillatory levers 22.

of" a series of oscillatory actuating levers22 ivoted in suitable earsorlugs 23 upon the hub 10 of the fixed element. These levers 22 areoscillatedby the engagement of a cam Asthe shift collar 24 is movedaxially, the levers 22 are oscillated causing them to bear against theshoulder 21. affordedfbythe section 17 of the actuating collar,'thereby'shifting such colto catch the clothing or endanger workmen. By revolublyad usting the actuatingring sect-ions16and 17 relative to eachlaraXially Within its surrounding flange 15 the clamp ring into grippingento draw gagement vWiththe interposed friction ring 7 *fThisgrippingmovementis effected by the coupling stud 19, and against thetension oftheretracting spring 20.

V v 'lh section 17 of the actuating i ing is ex tended at 26 to form ahousing or enclosure for the actuating levers, The construction issuchthat it presents'a substantially smooth exterior with no projectingportions likely the life of 'other,;the abutment shoulder 21 is advancedJ or retracted thereby enabling the'conipensa- V tion ffor Wear andenablingthe adj ustine nt'of f anyone of these relativelrotation oftheiing sections16 and the clamp ring- 13 independent of theaotuating'levers 22 to vary its gripping pressure. This L adjustment is] effectedby the scii'eyv threaded engagement 27of these ring sec- .tions; Thescrew threaded surface of one of. these ring sections 18- provided w thspaced grooves 28, arranged transversely of thescrew threads 27. A setscrew 291s engageable in grooved depressions by the 17 to secure saidringsections in their-adjust- Obviously-,1 other mechanical such as agear Wheel, Winding drum, sprocket interposed: between the limited tothe 'sp the means and construction herein d sclosed shift-collar 24,with "rollers 25 carof the clampringlid is regulated. v elements,

Wheeler other device may be substituted for employed as a drivi e11116111 063 or the-driven "member as conditions may require. i From theabove description it Wlll be apparent that there is thus provided adevice of the character described possessing the articular features ofthe 'advantage before enumerated as desirable, but which obviouslymodification in its form,

is susceptible I of proportions, detail construction and arrangeedrelation by vvhich the engaging pressure.

the flanged pulley 4t." Ttfi's equally obvious that either the fixed orloose member may be nientof partsv without departing from the vprinciple involved or sacrificing any of its advantages.

, llvhilfe in. order to comply with the statute;

the invention has been described in language more orl essfspecific as tostructural featuresp it is to'be understood that the invention is noteciflc details shown, but that OO1l1PI'lS8S, tl1 preferred form of;several modes ofputting the invention into effect I and the inventionis, therefore,'clain ied in any ofits forms or modifications Within thelegitimate and valid scopeof the appended claims. v i I 1.

Having thus described ourinventiomrwe claimz, 1. Inaffriction clutch,'ashaft, driving and driven members, one of 'Which is loosely 1inouiitedfor rotation relative to the shaft and the other fixedly mounted forrotation iiiunisonxvit li the shaft, said fixed member including ahubportion, a peripheral flange" carried thereby in a plane perpendicularto the axis of rotation, and an annular flange. also carried by said hubportion and extend V ing concentrically in relation to the axis of"rotation, a clamp collar exteriorly surrounded ing' the annularconcentricjflange, and slidable thereon toward and from the peripheralflange, a friction ring interposed between the," I

clamp collarfand the peripheral flange. and operatively engaged with theloosely moms ediineinber for rotation in unison therewith, but capableof axial nove nent independent thereof, an axially inovable actuatingring operatively connected with the clamp collar to move the lattertoward the" peripheral flange to clampthefriction ringjtherebetween, "anabutment shoulder'ha-ving"screw V p threaded,engageinentivith theactuating ring, j 1

a plurality of operating levers; pivoted iipon said fixedlynounted'inemberand up'onopen ation engaging the abutment shoulder toeffect, clamping movement of the clamp ring,

and means for oscillating thelevers.

2. In a friction clutch, a shaft, driving and driven members, one 1 ofwhich is loosely mounted and the other fixedly. mounted upon the shaft,said fixed member including a clamp face disposed in aplanesubstantially perpendicular to the axis of rotatiom-and an annularflange concentric with the axis of" ment with the loosely mountedmember,and

means for adjusting the clamp ring includ-' ing an axially movableactuating ring,having operative connection with the clamp ring, andaplurality of operating levers engaging the actuating ring to move theclamp ring into operative engagement with the friction ring, saidactuating I ring being formed in two telescopically arranged sectionsone of which is coupled with the clamp ring and the other of whichafio'rds an adjust able abutment for the operating levers, and means formaintaining the sections in different positions of relative adjustment.

3. In a friction clutch a singlesliaft, driving-and driven elements, oneof which isfixedto the shaft, the other of'which is journaled' thereonfor freerevoluble movement, a friction'ring'carried by one of saidelements, a

clamp collar carried by the other element and 7 v means for relativelyadjustingthe clamp collar and friction ring into and out of oper ativeengagement including a plurality of" operating levers, a pair ofconcentric rings surrounding the operating levers, said rings beingaxially adjustable relative to each 3 other and also axially adjustablein unison,

' relative to said driving and driven elements,

and tie means extending interior-lyof the frictionring connecting the clamp collarand one of the axially adjustable concentric rings, 9 theother of said rings being engaged said levers. 1

' In vtestimony whereof, we havehereunto' set our hands this 12th;dayOf- Dec'ember A;D.1924l. v v y WILLIAM P. COEFMAN,

. CARL M. ANGLEMYER'

